Add more optimization of QScriptCore nodes.
Add more optimization of QScriptCore nodes.

- push a Map into a Reduce’s repair func
- pull a Map from a Drop/Take’s from branch

drostron/quasar,quasar-analytics/quasar,jedesah/Quasar,drostron/quasar,slamdata/slamengine,drostron/quasar,djspiewak/quasar,quasar-analytics/quasar,jedesah/Quasar,drostron/quasar,quasar-analytics/quasar,slamdata/quasar,jedesah/Quasar,quasar-analytics/quasar,jedesah/Quasar,slamdata/slamengine,slamdata/slamengine